Update Ruby installation instructions to use Brightbox's PPA like the recipe.
Update Ruby installation instructions to use Brightbox's PPA like the recipe.

articlemetrics/alm-report,articlemetrics/alm-report,lagotto/alm-report,articlemetrics/alm-report,mfenner/alm-report,lagotto/alm-report,lagotto/alm-report,mfenner/alm-report,mfenner/alm-report